1.瀏覽web頁面,點(diǎn)擊某個方法,并傳值給oc原生,原生界面做出響應(yīng).
使用場景: 瀏覽web頁面商品,點(diǎn)擊查看詳情,進(jìn)入原生界面瀏覽商品詳情.
#import <JavaScriptCore/JavaScriptCore.h>
#import <WebKit/WebKit.h>
@interface ViewController ()<WKNavigationDelegate,UIScrollViewDelegate,WKUIDelegate,WKScriptMessageHandler>
@property (nonatomic, strong) WKWebView *webView;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.view .backgroundColor =[UIColor whiteColor];
WKWebViewConfiguration *config = [[WKWebViewConfiguration alloc] init];
config.preferences = [[WKPreferences alloc] init];
config.preferences.minimumFontSize = 10;
config.preferences.javaScriptEnabled = YES;
config.preferences.javaScriptCanOpenWindowsAutomatically = NO;
config.userContentController = [[WKUserContentController alloc] init];
config.processPool = [[WKProcessPool alloc] init];
self.webView = [[WKWebView alloc] initWithFrame:self.view.bounds configuration:config];
//記得實(shí)現(xiàn)對應(yīng)協(xié)議,不然方法不會實(shí)現(xiàn).
self.webView.UIDelegate = self;
self.webView.navigationDelegate =self;
[self.view addSubview:self.webView];
[self.webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://192.168.1.188/index1.html"]]];
// **************** 此處劃重點(diǎn) **************** //
//添加注入js方法, oc與js端對應(yīng)實(shí)現(xiàn)
[config.userContentController addScriptMessageHandler:self name:@"collectSendKey"];
[config.userContentController addScriptMessageHandler:self name:@"collectIsLogin"];
//js端代碼實(shí)現(xiàn)實(shí)例(此處為js端實(shí)現(xiàn)代碼給大家粘出來示范的!!!):
//window.webkit.messageHandlers.collectSendKey.postMessage({body: 'goodsId=1212'});
}
#pragma mark - WKScriptMessageHandler
//實(shí)現(xiàn)js注入方法的協(xié)議方法
- (void)userContentController:(WKUserContentController *)userContentController
didReceiveScriptMessage:(WKScriptMessage *)message {
//找到對應(yīng)js端的方法名,獲取messge.body
if ([message.name isEqualToString:@"collectSendKey"]) {
NSLog(@"%@", message.body);
}
}
2.瀏覽web頁面,傳遞值給js界面,js界面通過值判斷處理邏輯.
使用場景: 瀏覽web頁面商品,加入購物車,js通過oc原生傳遞過去的userId是否為空,來判斷當(dāng)前app是否登錄,未登錄,跳轉(zhuǎn)原生界面登錄,已登錄,則直接加入購物車
#pragma mark --------- WKNavigationDelegate --------------
// 加載成功,傳遞值給js
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation
{
//獲取userId
//傳遞userId給 js端
NSString * userId = DEF_GET_OBJECT(UserID);
NSString * jsUserId;
if (!userId) {
jsUserId =@"";
}else{
jsUserId =userId;
}
//之所以給userId重新賦值,貌似是如果userId為空null 那么傳給js端,js說無法判斷,只好說,如果userId為null,重新定義為空字符串.如果大家有好的建議,可以在下方留言.
//同時,這個地方需要注意的是,js端并不能查看我們給他傳遞的是什么值,也無法打印,貌似是語言問題? 還是js騙我文化低,反正,咱們把值傳給他,根據(jù)雙方商量好的邏輯,給出判斷,如果正常,那就ok了.
NSString * jsStr =[NSString stringWithFormat:@"sendKey('%@')",jsUserId];
[self.webView evaluateJavaScript:jsStr completionHandler:^(id _Nullable result, NSError * _Nullable error) {
//此處可以打印error.
}];
//js端獲取傳遞值代碼實(shí)現(xiàn)實(shí)例(此處為js端實(shí)現(xiàn)代碼給大家粘出來示范的!!!):
//function sendKey(user_id){
$("#input").val(user_id);
}
}
//依然是這個協(xié)議方法,獲取注入方法名對象,獲取js返回的狀態(tài)值.
#pragma mark - WKScriptMessageHandler
- (void)userContentController:(WKUserContentController *)userContentController
didReceiveScriptMessage:(WKScriptMessage *)message {
//js端判斷如果userId為空,則返回字符串@"toLogin" ,或者返回其它值. js端代碼實(shí)現(xiàn)實(shí)例(此處為js端實(shí)現(xiàn)代碼給大家粘出來示范的!!!):
function collectIsLogin(goods_id){
if (/(iPhone|iPad|iPod|iOS)/i.test(navigator.userAgent)) {
try {
if( $("#input").val()){
window.webkit.messageHandlers.collectGzhu.postMessage({body: "'"+goods_id+"'"});
}else{
window.webkit.messageHandlers.collectGzhu.postMessage({body: 'toLogin'});
}
}catch (e){
//瀏覽器
alert(e);
}
//oc原生處理:
if ([message.name isEqualToString:@"collectIsLogin"]) {
NSDictionary * messageDict = (NSDictionary *)message.body;
if ([messageDict[@"body"] isEqualToString:@"toLogin"]) {
NSLog(@"登錄");
}else{
NSLog(@"正常跳轉(zhuǎn)");
NSLog(@"mess --- id == %@",message.body);
}
}
}
3.在交互中,關(guān)于alert (單對話框)函數(shù)、confirm(yes/no對話框)函數(shù)、prompt(輸入型對話框)函數(shù)時,實(shí)現(xiàn)代理協(xié)議 WKUIDelegate ,則系統(tǒng)方法里有三個對應(yīng)的協(xié)議方法.大家可以進(jìn)入WKUIDelegate 協(xié)議類里面查看.
#pragma mark - WKUIDelegate
- (void)webViewDidClose:(WKWebView *)webView {
NSLog(@"%s", __FUNCTION__);
}
// 在JS端調(diào)用alert函數(shù)時,會觸發(fā)此代理方法。
// JS端調(diào)用alert時所傳的數(shù)據(jù)可以通過message拿到
// 在原生得到結(jié)果后,需要回調(diào)JS,是通過completionHandler回調(diào)
- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler {
NSLog(@"%s", __FUNCTION__);
UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"alert" message:@"JS調(diào)用alert" preferredStyle:UIAlertControllerStyleAlert];
[alert addAction:[UIAlertAction actionWithTitle:@"確定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
completionHandler();
}]];
[self presentViewController:alert animated:YES completion:NULL];
NSLog(@"%@", message);
}
// JS端調(diào)用confirm函數(shù)時,會觸發(fā)此方法
// 通過message可以拿到JS端所傳的數(shù)據(jù)
// 在iOS端顯示原生alert得到Y(jié)ES/NO后
// 通過completionHandler回調(diào)給JS端
- (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL result))completionHandler {
NSLog(@"%s", __FUNCTION__);
UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"confirm" message:@"JS調(diào)用confirm" preferredStyle:UIAlertControllerStyleAlert];
[alert addAction:[UIAlertAction actionWithTitle:@"確定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
completionHandler(YES);
}]];
[alert addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
completionHandler(NO);
}]];
[self presentViewController:alert animated:YES completion:NULL];
NSLog(@"%@", message);
}
// JS端調(diào)用prompt函數(shù)時,會觸發(fā)此方法
// 要求輸入一段文本
// 在原生輸入得到文本內(nèi)容后,通過completionHandler回調(diào)給JS
- (void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(NSString *)prompt defaultText:(nullable NSString *)defaultText initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(NSString * __nullable result))completionHandler {
NSLog(@"%s", __FUNCTION__);
NSLog(@"%@", prompt);
UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"textinput" message:@"JS調(diào)用輸入框" preferredStyle:UIAlertControllerStyleAlert];
[alert addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
textField.textColor = [UIColor redColor];
}];
[alert addAction:[UIAlertAction actionWithTitle:@"確定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
completionHandler([[alert.textFields lastObject] text]);
}]];
[self presentViewController:alert animated:YES completion:NULL];
}
轉(zhuǎn)自ios js與oc原生WKWebView方法注入及交互傳值